<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        /*选择器{样式}*/
        /*给谁改样式{改什么样式}*/
        p {
            color: rgb(25, 16, 104);
            font-size: 12px;
            /*修改了文字大小为12像素*/
        }
    </style>
</head>

<body>
    <p>有点意思</p>
</body>

</html>